Share Email Print

Proceedings Paper

Photonic mid-infrared nulling for exoplanet detection on a planar chalcogenide platform
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

The future of exoplanet detection lies in the mid-infrared (MIR). The MIR region contains the blackbody peak of both hot and habitable zone exoplanets, making the contrast between starlight and planet light less extreme. It is also the region where prominent chemical signatures indicative of life exist, such as ozone at 9.7 μm. At a wavelength of 4 μm the difference in emission between an Earth-like planet and a star like our own is 80 dB. However a jovian planet, at the same separation exhibits 60 dB of contrast, or only 20 dB if it is hot due to its formation energy or being close to its host star. A two dimensional nulling interferometer, made with chalcogenide glass, has been measured to produce a null of 20 dB depth, limited by scattered light. Measures to increase the null depth to the theoretical limit of 60 dB are discussed.

Paper Details

Date Published: 9 July 2018
PDF: 11 pages
Proc. SPIE 10701, Optical and Infrared Interferometry and Imaging VI, 107011E (9 July 2018); doi: 10.1117/12.2311904
Show Author Affiliations
Harry-Dean Kenchington Goldsmith, The Australian National Univ. (Australia)
Michael J. Ireland, The Australian National Univ. (Australia)
Pan Ma, The Australian National Univ. (Australia)
Barry Luther-Davies, The Australian National Univ. (Australia)
Rongping Wang, Ningbo Univ. (China)
Barnaby Norris, The Univ. of Sydney (Australia)
Peter Tuthill, The Univ. of Sydney (Australia)
Stephen J. Madden, The Australian National Univ. (Australia)

Published in SPIE Proceedings Vol. 10701:
Optical and Infrared Interferometry and Imaging VI
Michelle J. Creech-Eakman; Peter G. Tuthill; Antoine Mérand, Editor(s)

© SPIE. Terms of Use
Back to Top